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#include "text_block.h"
#include "ui/window.h"
#include "graph/graph.h"
#include "exception.h"
namespace cru
{
namespace ui
{
namespace controls
{
TextBlock::TextBlock(const Microsoft::WRL::ComPtr<IDWriteTextFormat>& init_text_format,
const Microsoft::WRL::ComPtr<ID2D1Brush>& init_brush)
{
text_format_ = init_text_format;
if (init_brush == nullptr)
CreateDefaultBrush();
}
TextBlock::~TextBlock() = default;
void TextBlock::SetText(const String& text)
{
const auto old_text = text_;
text_ = text;
OnTextChangedCore(old_text, text);
}
void TextBlock::SetBrush(const Microsoft::WRL::ComPtr<ID2D1Brush>& brush)
{
brush_ = brush;
Repaint();
}
void TextBlock::SetTextFormat(const Microsoft::WRL::ComPtr<IDWriteTextFormat>& text_format)
{
text_format_ = text_format;
RecreateTextLayout();
Repaint();
}
void TextBlock::OnSizeChangedCore(events::SizeChangedEventArgs& args)
{
RecreateTextLayout();
Repaint();
}
void TextBlock::OnDraw(ID2D1DeviceContext* device_context)
{
device_context->DrawTextLayout(D2D1::Point2F(), text_layout_.Get(), brush_.Get());
}
Size TextBlock::OnMeasure(const Size& available_size)
{
//TODO!
}
void TextBlock::OnTextChangedCore(const String& old_text, const String& new_text)
{
RecreateTextLayout();
Repaint();
}
void TextBlock::CreateDefaultBrush()
{
const auto device_context = graph::GraphManager::GetInstance()->GetD2D1DeviceContext();
Microsoft::WRL::ComPtr<ID2D1SolidColorBrush> solid_color_brush;
device_context->CreateSolidColorBrush(D2D1::ColorF(D2D1::ColorF::Black), &solid_color_brush);
brush_ = solid_color_brush;
}
void TextBlock::CreateDefaultTextFormat()
{
const auto dwrite_factory = graph::GraphManager::GetInstance()->GetDWriteFactory();
ThrowIfFailed(dwrite_factory->CreateTextFormat(
L"����", nullptr,
DWRITE_FONT_WEIGHT_NORMAL,
DWRITE_FONT_STYLE_NORMAL,
DWRITE_FONT_STRETCH_NORMAL,
24.0, L"zh-cn",
&text_format_
));
}
void TextBlock::RecreateTextLayout()
{
if (text_.empty())
{
text_layout_ = nullptr;
return;
}
const auto dwrite_factory = graph::GraphManager::GetInstance()->GetDWriteFactory();
if (text_format_ == nullptr)
CreateDefaultTextFormat();
const auto&& size = GetSize();
dwrite_factory->CreateTextLayout(
text_.c_str(), text_.size(),
text_format_.Get(),
size.width, size.height,
&text_layout_
);
}
}
}
}
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